Ion exchange columns. A promising technology for nitrogen and phosphorus recovery in the main line of a wastewater treatment plant.

Autor: Ruiz-Cosgaya L; CALAGUA, Unidad Mixta UV-UPV, Institut Universitari d'Investigaciò d'Enginyeria de l'Aigua i Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain. Electronic address: lruicos@upv.es., Izquierdo WA; CALAGUA, Unidad Mixta UV-UPV, Institut Universitari d'Investigaciò d'Enginyeria de l'Aigua i Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain., Martínez-Guijarro R; Institut Universitari d'Investigaciò d'Enginyeria de l'Aigua i Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain., Serralta J; CALAGUA, Unidad Mixta UV-UPV, Institut Universitari d'Investigaciò d'Enginyeria de l'Aigua i Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain., Barat R; CALAGUA, Unidad Mixta UV-UPV, Institut Universitari d'Investigaciò d'Enginyeria de l'Aigua i Medi Ambient, IIAMA, Universitat Politècnica de València, Camí de Vera s/n, 46022, Valencia, Spain.
Jazyk: angličtina
Zdroj: Journal of environmental management [J Environ Manage] 2024 Nov; Vol. 370, pp. 122719. Date of Electronic Publication: 2024 Oct 08.
DOI: 10.1016/j.jenvman.2024.122719
Abstrakt: Anaerobic membrane bioreactor (AnMBR) technology has great advantages for treating urban wastewaters, but, when irrigation cannot be applied and the effluent is discharged in a sensitive zone, a post-treatment of this effluent is needed for nitrogen and phosphorus removal. Under this scenario, ion exchange processes represent one of the most promising technologies for treating this effluent. Ion exchange technology allows to meet discharge limits and to recover these nutrients in a highly concentrated stream. In this work, the technical feasibility of using a commercial resin for phosphorus recovery and a natural zeolite (clinoptilolite) for nitrogen recovery was evaluated. Purolite FerrIX A33E resin removed phosphate from the AnMBR permeate within 500 Bed Volumes (BVs) with a maximum adsorption capacity (q max ) of 2,1 mg P-PO 4 /g resin. Regeneration of the resin (2% NaOH 2% NaCl) recovered over 95% of the phosphorous retained, achieving a concentration of 316,7 mg P-PO 4 /L in the regeneration solution. In the absence of a long-term study, the resin showed a stable adsorption capacity during 16 cycles of saturation-regeneration. Clinoptilolite removed nitrogen within 139 BVs obtaining a q max of 3,68 mg N-NH4/g zeolite. 97 % of the retained N-NH 4 was recovered in the regeneration stage (0,8% NaOH) with an average concentration of 577 mg N-NH 4 /L. Continuous exposure of the zeolite to alkaline solutions led to reduction of 50% of the adsorption capacity after 17 cycles.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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